Lighting fixture



Jan. 18, 1927.

J. M. BARTKOWIAK LIGHTING FIXTURE Filed June 23. 1924 2 Sheets-Sheet 1 1,614,591 1927' J. M. BARTKOWIAK LIGHTING FIXTURE Filed June 23, 1924 2 Sheets-Sheet 2 25 i V H 20 25 27 I jiv '1 .4

Patented Jan. 18, 1927.

UNITED STATES rau sai PATENT oFF cE.

JOSEPH M. BAR'IKO'WIAK, OF CHICAGO, ILLINOIS.

LIGHTING Application filed June 23,

My invention belongs to that general class of devices known as lighting fixtures, and relates more particularly to a portable, ad just-able fixture having a wide range of adjustment, and which will remain in the desired adjustment independently of fastening devices or the like. The invention has among its objects the production of a simple, compact, durable, reliable, convenient, attractive and GiilClGllt device of the kind described for use wherever found applicable. The device is particularly convenient for use in shops such as machine shops, paint shops and the like, and in garages and various other places where it is desired to have a lighting fixture adapted to direct the light and hold the lamp at a desired point whether high or low and regardless of whether the light is to be directed upwardly or clownwardly or otherwise. Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosures herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claim.

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. 1 is a side elevation of my improved fixture;

Fig. 2 is a sectional view taken substantially on line 22 of Fig- 1;

Fig. 3 is a sectional view taken substan tially on line 3*8 of Fig. 1; v

Fig. 4-. is a sectional view taken substantially on line H of Fig. 1;

Fig. 5 is a sectional view taken substantially on line 55 of Fig. 1; and

Fig. 6 is a sectional view taken substantially on line 66 of Fig. 1.

deferring to the drawings in which the preferred form of my device is shown, 1 represents a base of suitable size, shape and ma terial, which I prefer to provide with a central hub 2 preferably having a bore for receiving a standard 3. The member or standard 3 is provided with a head part i, which is adapted to pivotally' carry the apparatus and supporting arm therefor. As shown, 55 represent arms which are secured to a head piece 6 by means of screws 7 or their equivalents for the purpose, so that the bars FIXTURE.

1924. Serial No. 721,896.

5-5 and head piece 6 constitute a unitary structure or yoke. A bolt 8 extending through the arms and the part 4: secures the apparatus on the standard 3 and permits adjustment relative the standard. Ordinarily, the lit between the part land the side arms is sufficient to provide some friction, and the friction between the parts may be increased by tightening the bolt 8, owing to the limited resiliency in the arms 55.

Arranged at the free or lower ends of the arms 5 are counterweights 9, which are preferably shaped substantially as shown, the same being secured to the arms by means of screws 10 or the equivalent. As shown, I groove the counterweights on the inner faces to fit the arms 5'5 so that one screw 10 for each arm and counterweight is sufficient, the engagement of the arm and counterweight preventing movement about the screws. The construction is such that the parts are frictionally secured together to the extent that the structure may be adjusted at will, although ordinarily it will retain its adjusted position. The counterweights are made suflicient to counterbalance the lamp and supporting structure between the base and lamp or the like, as will be hereinafter described.

Extending from the top of the member 6 is a tubular rod or pipe 18 arranged to telescope, within which is the tubular supporting member 21. These parts are maintained in the desired relative adjustment by means of a clamping member 20, the outside pipe 18 being preferably slotted at the upper end as indicated at 19. The clamp 20 is not only positive in action, but is also abjustable as constructed.

Referring particularly to Fig. 5, the same is provided with the two flanges 24, through which is extended the bolt 25 having a threaded engagement with one flange. At the opposite end of the bolt is a cam member 26 secured to the bolt by a pin 27 or the equivalent. The cam is provided with an operating lever 28, In Fig. 5, a clamp is shown with the cam in position to tightly'lock the clamp and secure the'two members 18 and 21 together. Throwing the handle back relieves the pressure on the clamp and member 21 may be pulled out or pushed in as the case may be, and thence locked at-a desired point. If the handle 28 is thrown to release the cam, the bottom may be rotated in the flange part so that a difierent adjustment is secured,

Obviously, there may be any number of telescoping members secured together in the manner described, or in any equivalent manner, but generally two members are suflicient tor the purpose. Arranged on the outer end of the member .21 is a head 22 which carries a yoke 29 secured thereto by a bolt 30 having a winged head 31 so that the same may be adjusted to give a desired tension. The yoke member 29 carries the extending conduit 32, at the free end of which may be arranged the lamp socket and switch 33. I have shown an adjustable reflector 3 L mounted on the socket, which may be turned as desired. The conductor 35 is shown extending through the conduit 32 to the socket 33. I have not considered it necessary to show the entire conductor or the attaching plug, etc. Preferably provided on the member 18 are the brackets or cleats 36 on which the conductors may be secured when the device is not in use.

In using the device, the same may be tilted at any angle at the base, adjusted for any length of members 18 and 21, and the member 32 adjusted as desired, as may also be the reflector 34. The lamp may be tilted at any angle on the base, the counterbalance weights 9 at the lower end balancing the lamp end so that the center of gravity of the device is always within the confines of the base. The device, therefore, will not tip over, regardless of any adjustment. The fixture is particularly adapted for use in shops, or the like, as the light may be directed to practically any point from any desired angle without requiring additional fastening means, hooks or holding. It is found especially convenient in paint shops, especially where the work is of varied kinds. For instance, it is convenient to direct the same upon the top of an automobile or high piece of furniture without touching the same, or it may likewise be placed so that it will illuminate the under part of an automobile or other machinery. In other words, it is practically universally adjustable for a Wide range. It may be so adjusted that not only is the lamp supported and the light directed as desired, but also placed so that it is out of the way of the Worker. For example, it may be so adjusted as to direct the work from over his shoulder or from above his head, and it may be held in such position that it will not interfere with his Work. lVhile the counter-weights may be made of any desired weight, they are preferably such that they will slightly more than balance the fixture, regardless of the position of the lamp. The adjustment at the base is preferably only tight enough so that the lamp may he maintained in the desired adjustment and yet may be easily and conveniently pulled around without in any way tilting the base.

Having thus described my invention, it obvious that various immaterial modifications may be n'iade in the same without dcpa-rting from the spirit of my invention; hence I do not wish to be understood as limiting myself to the exact form, construction, arrangei'nent and combination of parts herein shown and described or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

A lighting fixture comprising a substantially portable base, a substantially upright standard projecting from the base, a pair of arms pivotally secured to the standard, one of said arms being disposed on either side of the standard, counterbalancing weights fixed to the lower ends of said arms, a tubular member secured to the upper ends of said arms, a second member adapted to tele scope with said tubular member, means for clamping said members in a plurality of adjusted positions with respect to each other, an arm pivotally secured to the upper end of said second member, and a lamp carried by the free end of said last-mentioned arm.

In testimony whereof, I have hereunto signed my name.

JOSEPH M. BARTKOVJI'AK. 

